[aidenn0]

Phabricator is super easy to maintain. The out-of-the-box experience is better than any complete solution I've tried, including gitlab.

That being said, just like any other fairly complete solution, it's quite opinionated about the right way to do things, and it's very different from github or gitlab. In particular, since it is not tied to git, it duplicates some of git's functionality in its own tools. In many ways I find those tools to be better than what git uses (arcanist just seems more well thought-out from a UI perspective), but it is a learning curve.

If you are happy with svn or hg, and don't want to have to switch to git, Phabricator is a no-brainer. If your team is a bunch of super-advanced git users, they may not like having to learn a different way of doing things.